NYC Local Law 126 requires an annual parapet observation on every building that fronts a public sidewalk, at any height, due by December 31. Only fully detached one and two family homes are exempt, so most Brooklyn row houses are covered. MLM Construction Group inspects and repairs parapets across Brooklyn at (516) 713-9199.
Local Law 126 of 2021 added a yearly parapet check to the NYC building code. The DOB rule took effect on September 28, 2023, and the first full year ran in 2024. Three things about it catch Brooklyn owners off guard every single year.
A parapet, for anyone who has never had to name it, is the part of the exterior wall that continues past the roof line. On a Brooklyn row house it is the low wall at the front edge of the roof, usually brick, often capped with stone or metal coping. It is the piece of the building most likely to come down onto a sidewalk, which is the entire reason this law exists.
There are exactly two exemptions, and the first one is the one people get wrong.
Most of Brooklyn is attached row housing. That is the whole point. If your front wall rises above your roof and there is a public sidewalk underneath it, plan on doing the observation.
⚠️ Being a small building does not get you out of it. The FISP exemption for buildings six stories and under is a different law. Plenty of owners hear "my building is too small for Local Law 11" and assume they are clear on parapets too. They are not.
The rule asks for a person with relevant knowledge of building construction. In practice that includes:
The standard is looser than FISP, which requires a QEWI. That is deliberate, because the city did not want every small owner hiring an engineer every year. But if the building is over six stories, if there is already a violation on the property, or if the parapet is in visibly bad shape, have a PE or RA sign it. The report is what you hold up if a piece of coping ever comes off that wall, and the credential on it matters at that moment.
There is no city form to fill out, which is why so many of the reports floating around Brooklyn are useless. A report that will actually hold up includes:
Keep it for six years. That is the retention period, and it means the file has to survive a change of managing agent, which is where these reports usually disappear.
Same conditions turn up over and over on row house blocks built between 1900 and 1940.
This is where the cost shows up. The moment an unsafe condition is identified, the owner has to install public protection immediately, and it stays up until the condition is corrected. In practice that is a sidewalk shed or, on a narrow row house frontage, netting and a fence.
Sheds are rented by the linear foot per month. On a 20 foot Brooklyn row house frontage owners commonly pay in the hundreds of dollars per month, and the meter runs from the day it goes up until the repair passes. Every month you delay the masonry work is another month of rental. This is the same trap covered in our guide to getting a sidewalk shed taken down: the shed is cheap to put up and expensive to leave.
| Parapet observation (LL126) | FISP facade (LL11) | |
|---|---|---|
| Applies to | Any building fronting the public right of way, any height | Buildings over six stories |
| How often | Every year | Every five years, by cycle and sub cycle |
| Who signs it | Person with relevant construction knowledge | QEWI: a PE or RA meeting DOB criteria |
| Filed with DOB | No, kept on file six years | Yes, filed in DOB NOW: Safety |
| Deadline | December 31 each year | Per your cycle filing window |
If you own a seven story building in Park Slope, you need both. They are separate obligations and one does not satisfy the other.
For a typical Brooklyn row house or small mixed use building, a documented parapet observation with photographs is a few hundred dollars. An engineer sealed report on a larger building costs more. Repairs are the real number, and they depend entirely on what the wall needs.
| Work | Typical Brooklyn range |
|---|---|
| Reset or replace coping on a row house frontage | $1,500 to $5,000 |
| Repoint the parapet, both faces | $3,000 to $9,000 |
| Rebuild the top courses of a leaning parapet | $8,000 to $25,000 |
| Sidewalk shed rental while work is pending | Hundreds per month, by linear foot |
Ranges depend on frontage, access, scaffold needs and whether the building is in a landmark district. We price every job after looking at the wall, not over the phone.
The deadline is December 31, but masonry does not want to be repaired in January. Mortar needs temperatures above about 40 degrees to cure properly, so a parapet found unsafe in mid December sits under a rented shed until spring. Booking the observation in September or October leaves room to actually fix what it finds inside the same season. It also lines up with the rest of the fall roof work, since the crew is already up there.
Probably yes. Local Law 126 exempts only fully detached one and two family homes, and buildings where a fence or barrier keeps people away from the wall. Most Brooklyn row houses are attached, so the exemption does not apply to them even though they are small one and two family houses. If your front wall rises above the roof and faces the sidewalk, you need the annual observation.
December 31 of every year. The observation is annual, not on a five year cycle like FISP, so a report dated last December does not cover you this year. The report is not filed with the Department of Buildings. You keep it on file and produce it if DOB asks.
A person with relevant knowledge of building construction. That covers a professional engineer, a registered architect, a licensed mason or roofer, a building superintendent with construction experience, and licensed building or insurance inspectors. A professional engineer or registered architect carries the most weight if a condition is later disputed, and is the right call on any building over six stories.
Failing to produce a current report when DOB asks starts at $1,250, and continued non compliance can reach $10,000. The bigger cost is usually the unsafe condition itself. Once an unsafe parapet is identified you must install public protection immediately and keep it up until the repair is done, and a sidewalk shed on a Brooklyn row house runs into the hundreds of dollars per month.
FISP, also called Local Law 11, applies only to buildings over six stories and runs on a five year cycle with a report filed in DOB NOW. The parapet observation applies to buildings of any height, happens every year, and is kept on file instead of filed. A six story building in Brooklyn can easily need both.
MLM Construction Group inspects, photographs and repairs parapets across Brooklyn, Queens and Staten Island. We document the wall, tell you straight whether it needs work, and do the masonry if it does. Licensed, insured & Google Guaranteed.
📞 (516) 713-9199 Get Free Estimate